Is “Spookiest” a Scrabble word?
Yes
SPOOKIEST
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Spookiest
adjective
1.Eerie, or suggestive of ghosts or the supernatural.
2.Spooked; afraid; frightened.
3.Unpredictably excitable; skittish (used especially of horses).